Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001104659-20-059703-index-headers.html | 2020-05-11 17:49:19 | |
| 0001104659-20-059703-index.html | 2020-05-11 17:49:19 | |
| 0001104659-20-059703.txt | 2020-05-11 17:49:19 | |
 0001104659-20-059703-xbrl.zip | 13328 | 2020-05-11 17:49:19 |
| fibk-20200511.xsd | 2616 | 2020-05-11 17:49:19 |
| fibk-20200511_lab.xml | 34591 | 2020-05-11 17:49:19 |
| fibk-20200511_pre.xml | 22702 | 2020-05-11 17:49:19 |
| FilingSummary.xml | 1636 | 2020-05-11 17:49:19 |
| Financial_Report.xlsx | 5789 | 2020-05-11 17:49:19 |
| MetaLinks.json | 37844 | 2020-05-11 17:49:19 |
| R1.htm | 38612 | 2020-05-11 17:49:19 |
| report.css | 2766 | 2020-05-11 17:49:19 |
| Show.js | 1084 | 2020-05-11 17:49:19 |
| tm2012377-4_8k.htm | 28595 | 2020-05-11 17:49:19 |
| tm2012377-4_8k_htm.xml | 3504 | 2020-05-11 17:49:19 |
| tm2012377d4_ex99-1.htm | 8240 | 2020-05-11 17:49:19 |